convert_sample_to_byte_data

utils.rs

/// Converts a slice of signed 16-bit integers to a vector of unsigned 8-bit integers,
/// with little-endian byte order.
///
/// # Arguments
///
/// * `i16s`: A slice of signed 16-bit integers to convert. Each pair of integers represents
///           the left and right channel samples of an audio frame.
///
/// # Returns
///
/// A new vector of unsigned 8-bit integers, with little-endian byte order. Each pair of
/// integers in the input slice is split into four 8-bit integers in the output vector,
/// with the lower and upper bytes of each 16-bit integer swapped.
///
/// # Examples
///
/// ```
/// let samples = vec![(0x1234, 0x5678), (0x9ABC, 0xDEF0)];
/// let bytes = convert_sample_to_byte_data(&samples);
/// assert_eq!(bytes, vec![0x34, 0x12, 0x78, 0x56, 0xBC, 0x9A, 0xF0, 0xDE]);
/// ```
pub(crate) fn convert_sample_to_byte_data(i16s: &[(i16, i16)]) -> Vec<u8> {
    let mut u8s = Vec::new();

    for &(left, right) in i16s {
        u8s.push((left & 0xFF) as u8);
        u8s.push(((left >> 8) & 0xFF) as u8);
        u8s.push((right & 0xFF) as u8);
        u8s.push(((right >> 8) & 0xFF) as u8);
    }

    u8s
}